6 replies to this topic

[mebob]

Hi, I have looked all over for a tutorial or at least an example of how to read/write to and from an ATA drive. The only things I found were written in C, and I would prefer one that is not (it is easier for me to understand it when written in assembly). I don't want to use BIOS interrupts, because I am planning on doing this in protected mode. Does anyone know of a tutorial, or can someone give me a quick, to the point one right here?

[dargueta]

You can just compile the C code and look at the assembly, I guess. C is pretty good about corresponding almost directly to machine code anyway.

[mebob]

The thing is, the examples contained functions such as "outb()" and such, which, as far as I'm aware, isn't available on a modern compiler.

[Alexander]

mebob said:

The thing is, the examples contained functions such as "outb()" and such, which, as far as I'm aware, isn't available on a modern compiler.

I am not sure, but you can decipher <asm/io.h>'s macros for inb() and outb().
http://git.kernel.or...ic/io.h;hb=HEAD

[mebob]

This is what I'm looking at: IDE - OSDev Wiki
None of it is making any sense to me. All I am looking for is a really basic, beginner tutorial/guide to this stuff, if one exists.

[dargueta]

What part don't you get? I can probably explain it to you.

[mebob]

What I mean is I just can't comprehend it all. It would be really great if you could explain it.